609 lines
20 KiB
C
609 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* webcam.c -- USB webcam gadget driver
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*
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* Copyright (C) 2009-2010
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* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/usb/video.h>
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#include "u_uvc.h"
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#include "uvc_configfs.h"
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USB_GADGET_COMPOSITE_OPTIONS();
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/*-------------------------------------------------------------------------*/
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/* module parameters specific to the Video streaming endpoint */
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static unsigned int streaming_interval = 1;
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module_param(streaming_interval, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(streaming_interval, "1 - 16");
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static unsigned int streaming_maxpacket = 1024;
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module_param(streaming_maxpacket, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(streaming_maxpacket, "1 - 1023 (FS), 1 - 3072 (hs/ss)");
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static unsigned int streaming_maxburst;
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module_param(streaming_maxburst, uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(streaming_maxburst, "0 - 15 (ss only)");
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/* --------------------------------------------------------------------------
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* Device descriptor
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*/
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#define WEBCAM_VENDOR_ID 0x1d6b /* Linux Foundation */
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#define WEBCAM_PRODUCT_ID 0x0102 /* Webcam A/V gadget */
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#define WEBCAM_DEVICE_BCD 0x0010 /* 0.10 */
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static char webcam_vendor_label[] = "Linux Foundation";
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static char webcam_product_label[] = "Webcam gadget";
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static char webcam_config_label[] = "Video";
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/* string IDs are assigned dynamically */
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#define STRING_DESCRIPTION_IDX USB_GADGET_FIRST_AVAIL_IDX
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static struct usb_string webcam_strings[] = {
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[USB_GADGET_MANUFACTURER_IDX].s = webcam_vendor_label,
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[USB_GADGET_PRODUCT_IDX].s = webcam_product_label,
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[USB_GADGET_SERIAL_IDX].s = "",
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[STRING_DESCRIPTION_IDX].s = webcam_config_label,
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{ }
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};
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static struct usb_gadget_strings webcam_stringtab = {
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.language = 0x0409, /* en-us */
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.strings = webcam_strings,
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};
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static struct usb_gadget_strings *webcam_device_strings[] = {
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&webcam_stringtab,
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NULL,
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};
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static struct usb_function_instance *fi_uvc;
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static struct usb_function *f_uvc;
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static struct usb_device_descriptor webcam_device_descriptor = {
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.bLength = USB_DT_DEVICE_SIZE,
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.bDescriptorType = USB_DT_DEVICE,
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/* .bcdUSB = DYNAMIC */
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.bDeviceClass = USB_CLASS_MISC,
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.bDeviceSubClass = 0x02,
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.bDeviceProtocol = 0x01,
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.bMaxPacketSize0 = 0, /* dynamic */
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.idVendor = cpu_to_le16(WEBCAM_VENDOR_ID),
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.idProduct = cpu_to_le16(WEBCAM_PRODUCT_ID),
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.bcdDevice = cpu_to_le16(WEBCAM_DEVICE_BCD),
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.iManufacturer = 0, /* dynamic */
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.iProduct = 0, /* dynamic */
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.iSerialNumber = 0, /* dynamic */
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.bNumConfigurations = 0, /* dynamic */
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};
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static const struct UVC_HEADER_DESCRIPTOR(1) uvc_control_header = {
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.bLength = UVC_DT_HEADER_SIZE(1),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_HEADER,
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.bcdUVC = cpu_to_le16(0x0110),
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.wTotalLength = 0, /* dynamic */
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.dwClockFrequency = cpu_to_le32(48000000),
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.bInCollection = 0, /* dynamic */
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.baInterfaceNr[0] = 0, /* dynamic */
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};
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static const struct uvc_camera_terminal_descriptor uvc_camera_terminal = {
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.bLength = UVC_DT_CAMERA_TERMINAL_SIZE(3),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_INPUT_TERMINAL,
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.bTerminalID = 1,
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.wTerminalType = cpu_to_le16(0x0201),
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.bAssocTerminal = 0,
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.iTerminal = 0,
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.wObjectiveFocalLengthMin = cpu_to_le16(0),
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.wObjectiveFocalLengthMax = cpu_to_le16(0),
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.wOcularFocalLength = cpu_to_le16(0),
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.bControlSize = 3,
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.bmControls[0] = 2,
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.bmControls[1] = 0,
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.bmControls[2] = 0,
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};
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static const struct uvc_processing_unit_descriptor uvc_processing = {
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.bLength = UVC_DT_PROCESSING_UNIT_SIZE(2),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_PROCESSING_UNIT,
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.bUnitID = 2,
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.bSourceID = 1,
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.wMaxMultiplier = cpu_to_le16(16*1024),
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.bControlSize = 2,
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.bmControls[0] = 1,
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.bmControls[1] = 0,
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.iProcessing = 0,
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.bmVideoStandards = 0,
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};
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static const struct uvc_output_terminal_descriptor uvc_output_terminal = {
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.bLength = UVC_DT_OUTPUT_TERMINAL_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VC_OUTPUT_TERMINAL,
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.bTerminalID = 3,
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.wTerminalType = cpu_to_le16(0x0101),
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.bAssocTerminal = 0,
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.bSourceID = 2,
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.iTerminal = 0,
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};
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DECLARE_UVC_INPUT_HEADER_DESCRIPTOR(1, 2);
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static const struct UVC_INPUT_HEADER_DESCRIPTOR(1, 2) uvc_input_header = {
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.bLength = UVC_DT_INPUT_HEADER_SIZE(1, 2),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_INPUT_HEADER,
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.bNumFormats = 2,
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.wTotalLength = 0, /* dynamic */
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.bEndpointAddress = 0, /* dynamic */
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.bmInfo = 0,
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.bTerminalLink = 3,
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.bStillCaptureMethod = 0,
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.bTriggerSupport = 0,
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.bTriggerUsage = 0,
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.bControlSize = 1,
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.bmaControls[0][0] = 0,
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.bmaControls[1][0] = 4,
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};
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static const struct uvcg_color_matching uvcg_color_matching = {
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.desc = {
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.bLength = UVC_DT_COLOR_MATCHING_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_COLORFORMAT,
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.bColorPrimaries = 1,
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.bTransferCharacteristics = 1,
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.bMatrixCoefficients = 4,
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},
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};
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static struct uvcg_uncompressed uvcg_format_yuv = {
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.fmt = {
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.type = UVCG_UNCOMPRESSED,
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/* add to .frames and fill .num_frames at runtime */
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.color_matching = (struct uvcg_color_matching *)&uvcg_color_matching,
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},
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.desc = {
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.bLength = UVC_DT_FORMAT_UNCOMPRESSED_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FORMAT_UNCOMPRESSED,
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.bFormatIndex = 1,
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.bNumFrameDescriptors = 2,
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.guidFormat = {
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'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00,
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0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71
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},
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.bBitsPerPixel = 16,
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.bDefaultFrameIndex = 1,
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.bAspectRatioX = 0,
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.bAspectRatioY = 0,
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.bmInterlaceFlags = 0,
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.bCopyProtect = 0,
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},
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};
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static struct uvcg_format_ptr uvcg_format_ptr_yuv = {
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.fmt = &uvcg_format_yuv.fmt,
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};
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DECLARE_UVC_FRAME_UNCOMPRESSED(1);
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DECLARE_UVC_FRAME_UNCOMPRESSED(3);
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#define UVCG_WIDTH_360P 640
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#define UVCG_HEIGHT_360P 360
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#define UVCG_MIN_BITRATE_360P 18432000
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#define UVCG_MAX_BITRATE_360P 55296000
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#define UVCG_MAX_VIDEO_FB_SZ_360P 460800
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#define UVCG_FRM_INTERV_0_360P 666666
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#define UVCG_FRM_INTERV_1_360P 1000000
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#define UVCG_FRM_INTERV_2_360P 5000000
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#define UVCG_DEFAULT_FRM_INTERV_360P UVCG_FRM_INTERV_0_360P
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static const struct UVC_FRAME_UNCOMPRESSED(3) uvc_frame_yuv_360p = {
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.bLength = UVC_DT_FRAME_UNCOMPRESSED_SIZE(3),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_UNCOMPRESSED,
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.bFrameIndex = 1,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(UVCG_WIDTH_360P),
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.wHeight = cpu_to_le16(UVCG_HEIGHT_360P),
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.dwMinBitRate = cpu_to_le32(UVCG_MIN_BITRATE_360P),
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.dwMaxBitRate = cpu_to_le32(UVCG_MAX_BITRATE_360P),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(UVCG_MAX_VIDEO_FB_SZ_360P),
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.dwDefaultFrameInterval = cpu_to_le32(UVCG_DEFAULT_FRM_INTERV_360P),
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.bFrameIntervalType = 3,
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.dwFrameInterval[0] = cpu_to_le32(UVCG_FRM_INTERV_0_360P),
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.dwFrameInterval[1] = cpu_to_le32(UVCG_FRM_INTERV_1_360P),
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.dwFrameInterval[2] = cpu_to_le32(UVCG_FRM_INTERV_2_360P),
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};
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static u32 uvcg_frame_yuv_360p_dw_frame_interval[] = {
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[0] = UVCG_FRM_INTERV_0_360P,
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[1] = UVCG_FRM_INTERV_1_360P,
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[2] = UVCG_FRM_INTERV_2_360P,
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};
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static const struct uvcg_frame uvcg_frame_yuv_360p = {
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.fmt_type = UVCG_UNCOMPRESSED,
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.frame = {
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.b_length = UVC_DT_FRAME_UNCOMPRESSED_SIZE(3),
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.b_descriptor_type = USB_DT_CS_INTERFACE,
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.b_descriptor_subtype = UVC_VS_FRAME_UNCOMPRESSED,
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.b_frame_index = 1,
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.bm_capabilities = 0,
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.w_width = UVCG_WIDTH_360P,
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.w_height = UVCG_HEIGHT_360P,
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.dw_min_bit_rate = UVCG_MIN_BITRATE_360P,
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.dw_max_bit_rate = UVCG_MAX_BITRATE_360P,
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.dw_max_video_frame_buffer_size = UVCG_MAX_VIDEO_FB_SZ_360P,
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.dw_default_frame_interval = UVCG_DEFAULT_FRM_INTERV_360P,
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.b_frame_interval_type = 3,
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},
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.dw_frame_interval = uvcg_frame_yuv_360p_dw_frame_interval,
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};
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static struct uvcg_frame_ptr uvcg_frame_ptr_yuv_360p = {
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.frm = (struct uvcg_frame *)&uvcg_frame_yuv_360p,
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};
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#define UVCG_WIDTH_720P 1280
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#define UVCG_HEIGHT_720P 720
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#define UVCG_MIN_BITRATE_720P 29491200
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#define UVCG_MAX_BITRATE_720P 29491200
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#define UVCG_MAX_VIDEO_FB_SZ_720P 1843200
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#define UVCG_FRM_INTERV_0_720P 5000000
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#define UVCG_DEFAULT_FRM_INTERV_720P UVCG_FRM_INTERV_0_720P
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static const struct UVC_FRAME_UNCOMPRESSED(1) uvc_frame_yuv_720p = {
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.bLength = UVC_DT_FRAME_UNCOMPRESSED_SIZE(1),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_UNCOMPRESSED,
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.bFrameIndex = 2,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(UVCG_WIDTH_720P),
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.wHeight = cpu_to_le16(UVCG_HEIGHT_720P),
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.dwMinBitRate = cpu_to_le32(UVCG_MIN_BITRATE_720P),
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.dwMaxBitRate = cpu_to_le32(UVCG_MAX_BITRATE_720P),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(UVCG_MAX_VIDEO_FB_SZ_720P),
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.dwDefaultFrameInterval = cpu_to_le32(UVCG_DEFAULT_FRM_INTERV_720P),
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.bFrameIntervalType = 1,
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.dwFrameInterval[0] = cpu_to_le32(UVCG_FRM_INTERV_0_720P),
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};
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static u32 uvcg_frame_yuv_720p_dw_frame_interval[] = {
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[0] = UVCG_FRM_INTERV_0_720P,
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};
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static const struct uvcg_frame uvcg_frame_yuv_720p = {
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.fmt_type = UVCG_UNCOMPRESSED,
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.frame = {
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.b_length = UVC_DT_FRAME_UNCOMPRESSED_SIZE(1),
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.b_descriptor_type = USB_DT_CS_INTERFACE,
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.b_descriptor_subtype = UVC_VS_FRAME_UNCOMPRESSED,
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.b_frame_index = 2,
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.bm_capabilities = 0,
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.w_width = UVCG_WIDTH_720P,
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.w_height = UVCG_HEIGHT_720P,
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.dw_min_bit_rate = UVCG_MIN_BITRATE_720P,
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.dw_max_bit_rate = UVCG_MAX_BITRATE_720P,
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.dw_max_video_frame_buffer_size = UVCG_MAX_VIDEO_FB_SZ_720P,
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.dw_default_frame_interval = UVCG_DEFAULT_FRM_INTERV_720P,
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.b_frame_interval_type = 1,
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},
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.dw_frame_interval = uvcg_frame_yuv_720p_dw_frame_interval,
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};
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static struct uvcg_frame_ptr uvcg_frame_ptr_yuv_720p = {
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.frm = (struct uvcg_frame *)&uvcg_frame_yuv_720p,
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};
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static struct uvcg_mjpeg uvcg_format_mjpeg = {
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.fmt = {
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.type = UVCG_MJPEG,
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/* add to .frames and fill .num_frames at runtime */
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.color_matching = (struct uvcg_color_matching *)&uvcg_color_matching,
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},
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.desc = {
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.bLength = UVC_DT_FORMAT_MJPEG_SIZE,
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FORMAT_MJPEG,
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.bFormatIndex = 2,
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.bNumFrameDescriptors = 2,
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.bmFlags = 0,
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.bDefaultFrameIndex = 1,
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.bAspectRatioX = 0,
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.bAspectRatioY = 0,
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.bmInterlaceFlags = 0,
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.bCopyProtect = 0,
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},
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};
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static struct uvcg_format_ptr uvcg_format_ptr_mjpeg = {
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.fmt = &uvcg_format_mjpeg.fmt,
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};
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DECLARE_UVC_FRAME_MJPEG(1);
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DECLARE_UVC_FRAME_MJPEG(3);
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static const struct UVC_FRAME_MJPEG(3) uvc_frame_mjpg_360p = {
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.bLength = UVC_DT_FRAME_MJPEG_SIZE(3),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_MJPEG,
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.bFrameIndex = 1,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(UVCG_WIDTH_360P),
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.wHeight = cpu_to_le16(UVCG_HEIGHT_360P),
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.dwMinBitRate = cpu_to_le32(UVCG_MIN_BITRATE_360P),
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.dwMaxBitRate = cpu_to_le32(UVCG_MAX_BITRATE_360P),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(UVCG_MAX_VIDEO_FB_SZ_360P),
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.dwDefaultFrameInterval = cpu_to_le32(UVCG_DEFAULT_FRM_INTERV_360P),
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.bFrameIntervalType = 3,
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.dwFrameInterval[0] = cpu_to_le32(UVCG_FRM_INTERV_0_360P),
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.dwFrameInterval[1] = cpu_to_le32(UVCG_FRM_INTERV_1_360P),
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.dwFrameInterval[2] = cpu_to_le32(UVCG_FRM_INTERV_2_360P),
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};
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static u32 uvcg_frame_mjpeg_360p_dw_frame_interval[] = {
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[0] = UVCG_FRM_INTERV_0_360P,
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[1] = UVCG_FRM_INTERV_1_360P,
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[2] = UVCG_FRM_INTERV_2_360P,
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};
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static const struct uvcg_frame uvcg_frame_mjpeg_360p = {
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.fmt_type = UVCG_MJPEG,
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.frame = {
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.b_length = UVC_DT_FRAME_MJPEG_SIZE(3),
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.b_descriptor_type = USB_DT_CS_INTERFACE,
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.b_descriptor_subtype = UVC_VS_FRAME_MJPEG,
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.b_frame_index = 1,
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.bm_capabilities = 0,
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.w_width = UVCG_WIDTH_360P,
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.w_height = UVCG_HEIGHT_360P,
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.dw_min_bit_rate = UVCG_MIN_BITRATE_360P,
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.dw_max_bit_rate = UVCG_MAX_BITRATE_360P,
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.dw_max_video_frame_buffer_size = UVCG_MAX_VIDEO_FB_SZ_360P,
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.dw_default_frame_interval = UVCG_DEFAULT_FRM_INTERV_360P,
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.b_frame_interval_type = 3,
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},
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.dw_frame_interval = uvcg_frame_mjpeg_360p_dw_frame_interval,
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};
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static struct uvcg_frame_ptr uvcg_frame_ptr_mjpeg_360p = {
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.frm = (struct uvcg_frame *)&uvcg_frame_mjpeg_360p,
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};
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static const struct UVC_FRAME_MJPEG(1) uvc_frame_mjpg_720p = {
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.bLength = UVC_DT_FRAME_MJPEG_SIZE(1),
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.bDescriptorType = USB_DT_CS_INTERFACE,
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.bDescriptorSubType = UVC_VS_FRAME_MJPEG,
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.bFrameIndex = 2,
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.bmCapabilities = 0,
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.wWidth = cpu_to_le16(UVCG_WIDTH_720P),
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.wHeight = cpu_to_le16(UVCG_HEIGHT_720P),
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.dwMinBitRate = cpu_to_le32(UVCG_MIN_BITRATE_720P),
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.dwMaxBitRate = cpu_to_le32(UVCG_MAX_BITRATE_720P),
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.dwMaxVideoFrameBufferSize = cpu_to_le32(UVCG_MAX_VIDEO_FB_SZ_720P),
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.dwDefaultFrameInterval = cpu_to_le32(UVCG_DEFAULT_FRM_INTERV_720P),
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.bFrameIntervalType = 1,
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.dwFrameInterval[0] = cpu_to_le32(UVCG_FRM_INTERV_0_720P),
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};
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static u32 uvcg_frame_mjpeg_720p_dw_frame_interval[] = {
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[0] = UVCG_FRM_INTERV_0_720P,
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};
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static const struct uvcg_frame uvcg_frame_mjpeg_720p = {
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.fmt_type = UVCG_MJPEG,
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.frame = {
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.b_length = UVC_DT_FRAME_MJPEG_SIZE(1),
|
|
.b_descriptor_type = USB_DT_CS_INTERFACE,
|
|
.b_descriptor_subtype = UVC_VS_FRAME_MJPEG,
|
|
.b_frame_index = 2,
|
|
.bm_capabilities = 0,
|
|
.w_width = UVCG_WIDTH_720P,
|
|
.w_height = UVCG_HEIGHT_720P,
|
|
.dw_min_bit_rate = UVCG_MIN_BITRATE_720P,
|
|
.dw_max_bit_rate = UVCG_MAX_BITRATE_720P,
|
|
.dw_max_video_frame_buffer_size = UVCG_MAX_VIDEO_FB_SZ_720P,
|
|
.dw_default_frame_interval = UVCG_DEFAULT_FRM_INTERV_720P,
|
|
.b_frame_interval_type = 1,
|
|
},
|
|
.dw_frame_interval = uvcg_frame_mjpeg_720p_dw_frame_interval,
|
|
};
|
|
|
|
static struct uvcg_frame_ptr uvcg_frame_ptr_mjpeg_720p = {
|
|
.frm = (struct uvcg_frame *)&uvcg_frame_mjpeg_720p,
|
|
};
|
|
|
|
static struct uvcg_streaming_header uvcg_streaming_header = {
|
|
};
|
|
|
|
static const struct uvc_descriptor_header * const uvc_fs_control_cls[] = {
|
|
(const struct uvc_descriptor_header *) &uvc_control_header,
|
|
(const struct uvc_descriptor_header *) &uvc_camera_terminal,
|
|
(const struct uvc_descriptor_header *) &uvc_processing,
|
|
(const struct uvc_descriptor_header *) &uvc_output_terminal,
|
|
NULL,
|
|
};
|
|
|
|
static const struct uvc_descriptor_header * const uvc_ss_control_cls[] = {
|
|
(const struct uvc_descriptor_header *) &uvc_control_header,
|
|
(const struct uvc_descriptor_header *) &uvc_camera_terminal,
|
|
(const struct uvc_descriptor_header *) &uvc_processing,
|
|
(const struct uvc_descriptor_header *) &uvc_output_terminal,
|
|
NULL,
|
|
};
|
|
|
|
static const struct uvc_descriptor_header * const uvc_fs_streaming_cls[] = {
|
|
(const struct uvc_descriptor_header *) &uvc_input_header,
|
|
(const struct uvc_descriptor_header *) &uvcg_format_yuv.desc,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_360p,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_720p,
|
|
(const struct uvc_descriptor_header *) &uvcg_color_matching.desc,
|
|
(const struct uvc_descriptor_header *) &uvcg_format_mjpeg.desc,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_360p,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_720p,
|
|
(const struct uvc_descriptor_header *) &uvcg_color_matching.desc,
|
|
NULL,
|
|
};
|
|
|
|
static const struct uvc_descriptor_header * const uvc_hs_streaming_cls[] = {
|
|
(const struct uvc_descriptor_header *) &uvc_input_header,
|
|
(const struct uvc_descriptor_header *) &uvcg_format_yuv.desc,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_360p,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_720p,
|
|
(const struct uvc_descriptor_header *) &uvcg_color_matching.desc,
|
|
(const struct uvc_descriptor_header *) &uvcg_format_mjpeg.desc,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_360p,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_720p,
|
|
(const struct uvc_descriptor_header *) &uvcg_color_matching.desc,
|
|
NULL,
|
|
};
|
|
|
|
static const struct uvc_descriptor_header * const uvc_ss_streaming_cls[] = {
|
|
(const struct uvc_descriptor_header *) &uvc_input_header,
|
|
(const struct uvc_descriptor_header *) &uvcg_format_yuv.desc,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_360p,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_yuv_720p,
|
|
(const struct uvc_descriptor_header *) &uvcg_color_matching.desc,
|
|
(const struct uvc_descriptor_header *) &uvcg_format_mjpeg.desc,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_360p,
|
|
(const struct uvc_descriptor_header *) &uvc_frame_mjpg_720p,
|
|
(const struct uvc_descriptor_header *) &uvcg_color_matching.desc,
|
|
NULL,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------
|
|
* USB configuration
|
|
*/
|
|
|
|
static int
|
|
webcam_config_bind(struct usb_configuration *c)
|
|
{
|
|
int status = 0;
|
|
|
|
f_uvc = usb_get_function(fi_uvc);
|
|
if (IS_ERR(f_uvc))
|
|
return PTR_ERR(f_uvc);
|
|
|
|
status = usb_add_function(c, f_uvc);
|
|
if (status < 0)
|
|
usb_put_function(f_uvc);
|
|
|
|
return status;
|
|
}
|
|
|
|
static struct usb_configuration webcam_config_driver = {
|
|
.label = webcam_config_label,
|
|
.bConfigurationValue = 1,
|
|
.iConfiguration = 0, /* dynamic */
|
|
.bmAttributes = USB_CONFIG_ATT_SELFPOWER,
|
|
.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW,
|
|
};
|
|
|
|
static int
|
|
webcam_unbind(struct usb_composite_dev *cdev)
|
|
{
|
|
if (!IS_ERR_OR_NULL(f_uvc))
|
|
usb_put_function(f_uvc);
|
|
if (!IS_ERR_OR_NULL(fi_uvc))
|
|
usb_put_function_instance(fi_uvc);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
webcam_bind(struct usb_composite_dev *cdev)
|
|
{
|
|
struct f_uvc_opts *uvc_opts;
|
|
int ret;
|
|
|
|
fi_uvc = usb_get_function_instance("uvc");
|
|
if (IS_ERR(fi_uvc))
|
|
return PTR_ERR(fi_uvc);
|
|
|
|
uvc_opts = container_of(fi_uvc, struct f_uvc_opts, func_inst);
|
|
|
|
uvc_opts->streaming_interval = streaming_interval;
|
|
uvc_opts->streaming_maxpacket = streaming_maxpacket;
|
|
uvc_opts->streaming_maxburst = streaming_maxburst;
|
|
|
|
uvc_opts->fs_control = uvc_fs_control_cls;
|
|
uvc_opts->ss_control = uvc_ss_control_cls;
|
|
uvc_opts->fs_streaming = uvc_fs_streaming_cls;
|
|
uvc_opts->hs_streaming = uvc_hs_streaming_cls;
|
|
uvc_opts->ss_streaming = uvc_ss_streaming_cls;
|
|
|
|
INIT_LIST_HEAD(&uvcg_format_yuv.fmt.frames);
|
|
list_add_tail(&uvcg_frame_ptr_yuv_360p.entry, &uvcg_format_yuv.fmt.frames);
|
|
list_add_tail(&uvcg_frame_ptr_yuv_720p.entry, &uvcg_format_yuv.fmt.frames);
|
|
uvcg_format_yuv.fmt.num_frames = 2;
|
|
|
|
INIT_LIST_HEAD(&uvcg_format_mjpeg.fmt.frames);
|
|
list_add_tail(&uvcg_frame_ptr_mjpeg_360p.entry, &uvcg_format_mjpeg.fmt.frames);
|
|
list_add_tail(&uvcg_frame_ptr_mjpeg_720p.entry, &uvcg_format_mjpeg.fmt.frames);
|
|
uvcg_format_mjpeg.fmt.num_frames = 2;
|
|
|
|
INIT_LIST_HEAD(&uvcg_streaming_header.formats);
|
|
list_add_tail(&uvcg_format_ptr_yuv.entry, &uvcg_streaming_header.formats);
|
|
list_add_tail(&uvcg_format_ptr_mjpeg.entry, &uvcg_streaming_header.formats);
|
|
uvcg_streaming_header.num_fmt = 2;
|
|
|
|
uvc_opts->header = &uvcg_streaming_header;
|
|
|
|
/* Allocate string descriptor numbers ... note that string contents
|
|
* can be overridden by the composite_dev glue.
|
|
*/
|
|
ret = usb_string_ids_tab(cdev, webcam_strings);
|
|
if (ret < 0)
|
|
goto error;
|
|
webcam_device_descriptor.iManufacturer =
|
|
webcam_strings[USB_GADGET_MANUFACTURER_IDX].id;
|
|
webcam_device_descriptor.iProduct =
|
|
webcam_strings[USB_GADGET_PRODUCT_IDX].id;
|
|
webcam_config_driver.iConfiguration =
|
|
webcam_strings[STRING_DESCRIPTION_IDX].id;
|
|
|
|
/* Register our configuration. */
|
|
if ((ret = usb_add_config(cdev, &webcam_config_driver,
|
|
webcam_config_bind)) < 0)
|
|
goto error;
|
|
|
|
usb_composite_overwrite_options(cdev, &coverwrite);
|
|
INFO(cdev, "Webcam Video Gadget\n");
|
|
return 0;
|
|
|
|
error:
|
|
usb_put_function_instance(fi_uvc);
|
|
return ret;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
* Driver
|
|
*/
|
|
|
|
static struct usb_composite_driver webcam_driver = {
|
|
.name = "g_webcam",
|
|
.dev = &webcam_device_descriptor,
|
|
.strings = webcam_device_strings,
|
|
.max_speed = USB_SPEED_SUPER,
|
|
.bind = webcam_bind,
|
|
.unbind = webcam_unbind,
|
|
};
|
|
|
|
module_usb_composite_driver(webcam_driver);
|
|
|
|
MODULE_AUTHOR("Laurent Pinchart");
|
|
MODULE_DESCRIPTION("Webcam Video Gadget");
|
|
MODULE_LICENSE("GPL");
|
|
|